A area DAOB ½ base height ½ AB OP. I go through two examples one given the radius and another given the diameter. Unit for measurement of the area is in square terms.
Or when you know the Circumference.
The area of the circle can be found out when the radius or diameter of the circle is given. You can find it by using proportions all you need to remember is circle area formula and we bet you do. How to Calculate the Area. Remember that what you do to one.